Early years, 1548–1576 Born Filippo Bruno in
Nola (a
comune in the modern-day
province of Naples, in the Southern Italian region of
Campania, then part of the
Kingdom of Naples) in 1548, he was the son of Giovanni Bruno (1517 – c. 1592), a soldier, and Fraulissa Savolino (1520–?). In his youth, he was sent to
Naples to be educated. He was tutored privately at the
Augustinian monastery there, and attended public lectures at the
local Studium Generale. At the age of 17, he entered the
Dominican Order at the monastery of
San Domenico Maggiore in Naples, taking the name Giordano, after Giordano Crispo, his
metaphysics tutor. He continued his studies there, completing his
novitiate, and
ordained a
Catholic priest in 1572 at age 24. During his time in Naples, he became known for his skill with the art of memory and on one occasion travelled to Rome to demonstrate his
mnemonic system before
Pope Pius V and
Cardinal Rebiba. In his later years, Bruno claimed that the Pope accepted his dedication to him of the lost work
On The Ark of Noah at this time. While Bruno was distinguished for outstanding ability, his taste for
free thinking and forbidden books soon caused him difficulties. Given the controversy he caused in later life, it is surprising that he was able to remain within the monastic system for eleven years. In his testimony to Venetian inquisitors during his trial many years later, he says that proceedings were twice taken against him for having cast away images of the saints, retaining only a
crucifix, and for having recommended controversial texts to a novice. Such behavior could perhaps be overlooked, but Bruno's situation became much more serious when he was reported to have defended the
Arian heresy, and when a copy of the banned writings of
Erasmus, annotated by him, was discovered hidden in the monastery
latrine. When he learned that an
indictment was being prepared against him in Naples, he fled, shedding his
religious habit, at least for a time.
First years of wandering, 1576–1583 Bruno first went to the Genoese port of
Noli, then to
Savona,
Turin and finally to
Venice, where he published his lost work
On the Signs of the Times with the permission (so he claimed at his trial) of the Dominican
Remigio Nannini Fiorentino. From Venice, he went to
Padua, where he met fellow Dominicans who convinced him to wear his
religious habit again. From Padua, he went to
Bergamo and then across the Alps to
Chambéry and
Lyon. His movements after this time are obscure. In 1579, Bruno arrived in
Geneva. During his Venetian trial, he told inquisitors that while in Geneva, he told the Marchese de Vico of Naples, who was notable for helping Italian refugees in Geneva, "I did not intend to adopt the religion of the city. I desired to stay there only that I might live at liberty and in security." Bruno had a pair of breeches made for himself, and the Marchese and others apparently made Bruno a gift of a sword, hat, cape and other necessities for dressing himself; in such clothing, Bruno could no longer be recognised as a priest. Things apparently went well for Bruno for a time, as he entered his name in the Rector's Book of the
University of Geneva in May 1579. But in keeping with his personality, he could not long remain silent. In August, he published an attack on the work of , a distinguished professor. Bruno and the printer, Jean Bergeon, were promptly arrested. Rather than apologising, Bruno insisted on continuing to defend his publication. He was refused the right to take
sacrament. Though this right was soon restored, he left Geneva. He went to France, arriving first in
Lyon, and thereafter settling for a time (1580–1581) in
Toulouse where he taught philosophy. He also attempted at this time to return to Catholicism, but was denied absolution by the
Jesuit priest he approached. When religious strife broke out in the summer of 1581, he moved to Paris. There he held a cycle of thirty lectures on theological topics and also began to gain fame for his prodigious memory. His talents attracted the benevolent attention of the king
Henry III; Bruno subsequently reported: "I got me such a name that King Henry III summoned me one day to discover from me if the memory which I possessed was natural or acquired by magic art. I satisfied him that it did not come from sorcery but from organised knowledge; and, following this, I got a book on memory printed, entitled
The Shadows of Ideas, which I dedicated to His Majesty. Forthwith he gave me an Extraordinary Lectureship with a salary." In Paris, Bruno enjoyed the protection of his powerful French patrons. During this period, he published several works on mnemonics, including
De umbris idearum (
On the Shadows of Ideas, 1582), (
The Art of Memory, 1582), and (''Circe's Song'', 1582; described at ). All of these were based on his mnemonic models of organised knowledge and experience, as opposed to the simplistic logic-based mnemonic techniques of
Petrus Ramus, then popular. Bruno also published a comedy summarising some of his philosophical positions, titled . In the 16th century, dedications were, as a rule, approved beforehand, and hence were a way of placing a work under the protection of an individual. Given that Bruno dedicated various works to the likes of King Henry III, Sir
Philip Sidney,
Michel de Castelnau (French Ambassador to England), and possibly
Pope Pius V, it is apparent that this wanderer had risen sharply in status and moved in powerful circles.
England, 1583–1585 In April 1583, Bruno went to England with letters of recommendation from
Henry III as a guest of the French ambassador,
Michel de Castelnau. Bruno lived at the French embassy with the lexicographer
John Florio. There he became acquainted with the poet
Philip Sidney (to whom he dedicated two books) and other members of the Hermetic circle around
John Dee, though there is no evidence that Bruno ever met Dee himself. He also lectured at
Oxford, and unsuccessfully sought a teaching position there. His views were controversial, notably with
John Underhill, Rector of
Lincoln College and subsequently bishop of Oxford, and
George Abbot, who later became
Archbishop of Canterbury. Abbot mocked Bruno for supporting "the opinion of
Copernicus that the earth did go round, and the heavens did stand still; whereas in truth it was his own head which rather did run round, and his brains did not stand still", and found Bruno had both plagiarised and misrepresented
Ficino's work, leading Bruno to return to the continent. Nevertheless, his stay in England was fruitful. During that time Bruno completed and published some of his most important works, the six "Italian Dialogues", including the
cosmological tracts
La cena de le ceneri (
The Ash Wednesday Supper, 1584),
De la causa, principio et uno (
On Cause, Principle and Unity, 1584), ''De l'infinito, universo et mondi
(On the Infinite, Universe and Worlds
, 1584) as well as Lo spaccio de la bestia trionfante
(The Expulsion of the Triumphant Beast
, 1584) and (On the Heroic Frenzies
, 1585). Some of these were printed surreptitiously by John Charlewood (the title pages claim the books were printed in Venice or Paris). Some of the works that Bruno published in London, notably The Ash Wednesday Supper'', appear to have given offence. Once again, Bruno's controversial views and tactless language lost him the support of his friends.
John Bossy has advanced the theory that, while staying in the French Embassy in London, Bruno was also spying on Catholic conspirators, under the pseudonym "Henry Fagot", for
Sir Francis Walsingham,
Queen Elizabeth's Secretary of State. Bruno is sometimes cited as being the first to propose that the universe is infinite, which he did during his time in England, but an
English scientist,
Thomas Digges, put forth this idea in a published work in 1576, some eight years earlier than Bruno. An infinite universe and the possibility of alien life had also been earlier suggested by
German Catholic Cardinal Nicholas of Cusa in "On Learned Ignorance" published in 1440 and Bruno attributed his understanding of multiple worlds to this earlier scholar, whom he called "the divine Cusanus".
Last years of wandering, 1585–1592 In October 1585, Castelnau was recalled to France, and Bruno went with him. In Paris, Bruno found a tense political situation. Moreover, his 120 theses against
Aristotelian natural science soon put him in ill favour. In 1586, following a violent quarrel over these theses, he left France for Germany. 1588 In Germany, he failed to obtain a teaching position at
Marburg, but was granted permission to teach at
Wittenberg, where he lectured on
Aristotle for two years. However, with a change of intellectual climate there, he was no longer welcome, and went in 1588 to
Prague, where he obtained 300
taler from
Rudolf II, but no teaching position. He went on to serve briefly as a professor in
Helmstedt, but had to flee again in 1590 when he was
excommunicated by the
Lutherans. During this period, he produced several
Latin works, dictated to his friend and secretary Girolamo Besler, including
De Magia (
On Magic),
Theses De Magia (
Theses on Magic) and
De Vinculis in Genere (
A General Account of Bonding). All these were apparently transcribed or recorded by Besler (or Bisler) between 1589 and 1590. He also published
De Imaginum, Signorum, Et Idearum Compositione (
On the Composition of Images, Signs and Ideas, 1591). In 1591 he was in
Frankfurt, where he received an invitation from the
Venetian patrician
Giovanni Mocenigo, who wished to be instructed in the art of memory, and also heard of a vacant chair in mathematics at the
University of Padua. At the time, the
Inquisition seemed to be losing some of its strictness, and because the
Republic of Venice was the most liberal state in the
Italian Peninsula, Bruno was lulled into making the fatal mistake of returning to Italy. He went first to
Padua, where he taught briefly, and applied unsuccessfully for the chair of mathematics, which was given instead to
Galileo Galilei one year later. Bruno accepted Mocenigo's invitation and moved to Venice in March 1592. For about two months, he served as an in-house tutor to Mocenigo, to whom he let slip some of his heterodox ideas. Mocenigo denounced him to the
Venetian Inquisition, which had Bruno arrested on 22 May 1592. Among the numerous charges of
blasphemy and
heresy brought against him in Venice, based on Mocenigo's denunciation, was his belief in the
plurality of worlds, as well as accusations of personal misconduct. Bruno defended himself skillfully, stressing the philosophical character of some of his positions, denying others and admitting that he had had doubts on some matters of dogma. The Roman Inquisition, however, asked for his transfer to Rome. After several months of argument, the Venetian authorities reluctantly consented, and Bruno was sent to Rome in January 1593.
Imprisonment, trial and execution, 1593–1600 During the seven years of his trial in Rome, Bruno was held in confinement, lastly in the
Tower of Nona. Some important documents about the trial are lost, but others have been preserved, among them a summary of the proceedings that was rediscovered in 1940. The numerous charges against Bruno, based on some of his books as well as on witness accounts, included blasphemy, immoral conduct, and heresy in matters of dogmatic theology, and involved some of the basic doctrines of his philosophy and cosmology.
Luigi Firpo speculates the charges made against Bruno by the Roman Inquisition were: • holding opinions contrary to the
Catholic faith and speaking against it and its ministers; • holding opinions contrary to the Catholic faith about the
Trinity, the
deity of Christ, and the
Incarnation; • holding opinions contrary to the Catholic faith pertaining to Jesus as the
Christ; • holding opinions contrary to the Catholic faith regarding the
virginity of Mary, mother of Jesus; • holding opinions contrary to the Catholic faith about both
Transubstantiation and the
Mass; • claiming the existence of a
plurality of worlds and
their eternity; • believing in
metempsychosis and in the
transmigration of the human soul into brutes; • dealing in magics and divination. , Rome Bruno defended himself as he had in Venice, insisting that he accepted the Church's dogmatic teachings, but trying to preserve the basis of his cosmological views. In particular, he held firm to his belief in the plurality of worlds, although he was admonished to abandon it. His trial was overseen by the Inquisitor Cardinal
Bellarmine, who demanded a full recantation, which Bruno eventually refused. On 20 January 1600,
Pope Clement VIII declared Bruno a heretic, and the Inquisition issued a sentence of death. According to the correspondence of
Gaspar Schopp of
Breslau, he is said to have made a threatening gesture towards his judges and to have replied:
Maiori forsan cum timore sententiam in me fertis quam ego accipiam ("Perhaps you pronounce this sentence against me with greater fear than I receive it"). He was turned over to the secular authorities. On 17 February 1600, in the
Campo de' Fiori (a central Roman market square), naked, with his "tongue imprisoned because of his wicked words", he was
burned alive at the stake. His ashes were thrown into the
Tiber river. All of Bruno's works were placed on the
Index Librorum Prohibitorum in 1603. The inquisition cardinals who judged Giordano Bruno were
Cardinal Bellarmino (Bellarmine),
Cardinal Madruzzo (Madruzzi), Cardinal Camillo Borghese (later
Pope Paul V), Domenico Cardinal Pinelli, Pompeio Cardinal Arrigoni,
Cardinal Sfondrati,
Pedro Cardinal De Deza Manuel and
Cardinal Santorio (Archbishop of Santa Severina, Cardinal-Bishop of Palestrina). The measures taken to prevent Bruno from continuing to speak have resulted in his becoming a symbol for free thought and
free speech in present-day Rome, where an annual memorial service takes place close to the spot where he was executed.
Physical appearance The earliest likeness of Bruno is an engraving published in 1715 and cited by Salvestrini as "the only known portrait of Bruno". Salvestrini suggests that it is a re-engraving made from a now-lost original. ==Cosmology==